diff --git a/Gemfile.lock b/Gemfile.lock
index effcf4cf7..cc451f4ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -103,11 +103,11 @@ GEM
       activesupport (>= 4.2.0)
     govuk-content-schema-test-helpers (1.6.1)
       json-schema (~> 2.8.0)
-    govuk_app_config (2.2.1)
+    govuk_app_config (2.2.2)
       logstasher (>= 1.2.2, < 1.4.0)
       sentry-raven (>= 2.7.1, < 3.1.0)
       statsd-ruby (~> 1.4.0)
-      unicorn (>= 5.4, < 5.6)
+      unicorn (>= 5.4, < 5.7)
     govuk_frontend_toolkit (9.0.0)
       railties (>= 3.1.0)
       sass (>= 3.2.0)
@@ -315,7 +315,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.7)
     unicode-display_width (1.7.0)
-    unicorn (5.5.5)
+    unicorn (5.6.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     webdrivers (4.4.1)